To save a zip file, simply click on the Save zip files link on the left hand side. Once clicked, a Windows dialogue box displaying your desktop will appear. Browse your computer and choose the location where you would like to save your Zip file. Then type a name for your Zip file and click Save.

You can also click on the red "Zip" button at the top.

This feature allows you to save the Zip file you are working on with another name or different file extension. This is helpful because it allows you to alter the file you are working on but still keep the original Zip file intact. It is similar to the "Save a Copy" feature found in many applications.